breaking the 4th wall
The Fourth Wall refers to the imaginary border between Reality and Fiction. Characters who "break" this wall are often aware they are a fictional character or that there is a viewer watching them, and will say or do things to interact with them. Other times, they are able to defy their fictional realm's given physics, jump in and out of frames, appear in multiple places at once, have knowledge of events that happened in reality, etc, etc.
This tag has been aliased to breaking_the_fourth_wall (learn more).